P1233 on Kia vehicles
P1233 is named on 5 Kia model years (2016–2020): 10 manufacturer filings and 1 owner report in NHTSA’s files, across Optima.
Which Kia model years name P1233
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2019 Kia Optima | Fuel/Propulsion System | 2 | 1 |
| 2020 Kia Optima | Fuel/Propulsion System | 2 | — |
| 2018 Kia Optima | Fuel/Propulsion System | 2 | — |
| 2017 Kia Optima | Fuel/Propulsion System | 2 | — |
| 2016 Kia Optima | Fuel/Propulsion System | 2 | — |
A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
What Kia owners said
Source: NHTSA complaint databaseOwners’ own words, scrubbed of anything identifying. Unverified reports filed with NHTSA — what was said, not a finding that it was true.
After my mechanic inspected my vehicle we received error code P1233 and advised me to call the dealership as this is something covered under an extended warranty
Kia filings that name P1233
Source: NHTSA manufacturer communicationsBulletins and campaigns Kia filed with NHTSA whose summary names P1233. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- WTY028_TSB Service bulletin2022-10-28 · Fuel System, Gasoline
- TECHNICAL SERVICE BULLETIN: FUEL PUMP FILTER INSPECTION/REPLACEMENT - This bulletin provides information associated with the 'Warranty Extension Program' (WTY028) to inspect and, if necessary, replace the fuel pump filter assembly on 2016-2020MY Optima (JFa) vehicles produced from August 28, 2015 through June 23, 2020, for repairs that may be necessary to address a low-pressure fuel pump failure t
- WTY028_TSB_R1 Service bulletin2022-10-31 · Fuel System, Gasoline
- TECHNICAL SERVICE BULLETIN: FUEL PUMP FILTER INSPECTION/REPLACEMENT - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides information associated with the 'Warranty Extension Program' (WTY028) to inspect and, if necessary, replace the fuel pump filter assembly on 2016-2020MY O
What P1233 means
Source: SAE J2012 / OBD-IIP1233 is a manufacturer-specific code: the second character is a 1, which under the OBD-II standard hands the definition to whoever built the vehicle. The same code can mean one thing on a Ford and something unrelated on a Hyundai. Any site that prints a single definition for it is guessing.
A stored code names the test that failed, never the part that caused it. The record above is what Kia and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs P1233 a known problem on Kia vehicles?
It is a documented one: NHTSA's files hold 10 manufacturer filings and 1 owner report naming P1233 on 5 Kia model years (2016–2020). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Kia models does P1233 appear on most?
2019 Optima (3 documents), 2020 Optima (2 documents), 2018 Optima (2 documents).
Does P1233 on a Kia mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.